The core of a spring mattress is its internal spring system, which determines the mattress's support and resilience. Springs are generally divided into two types: individually pocketed springs and linked springs. Individually pocketed springs can bear pressure independently, conforming to the body's curves and reducing disturbance during tossing and turning; linked springs distribute pressure evenly throughout, providing strong support and higher durability. The material and design of the springs directly affect the mattress's comfort and lifespan.
A layer or more of comfort material is usually added on top of the springs; this is key to the softness and support we feel when lying down. Common comfort layer materials include latex, memory foam, sponge, or fiber. Latex has good elasticity and breathability; memory foam can evenly distribute body pressure; sponge and fiber provide a certain softness while increasing the mattress's cushioning effect. The thickness and material of the comfort layer directly affect the mattress's sleeping experience.
The bottom of the mattress usually has a non-slip fabric or support layer to fix the mattress's position and enhance stability. The edges may also be reinforced with steel edges or thickened padding to prevent sagging and increase lifespan. The overall structure achieves a balance of support, comfort, and durability through the reasonable combination of materials in the upper and lower layers, so that the mattress can both support the body and provide a good sleep experience.